Improvement in implements for edge-trimming soles



UNITED STATES ARTHUR r. HAZARD, on NORTH BRIDcEwATnR, MAssAonUsETTs.

IMPROVEMENT IN IMPLEMENTS FOR EDGE-TRIMMING SOLES.

Specification forming part of Letters Patent No. 143,823, dated October21, 1873; application filr d September 2, 1873.

To all whom it may concern:

Be it known that I, ARTHUR P. HAZARD, of

' and consists in combining with the blade of a knife: and a frame orblock affixed thereto, and provided with a protecting lip or guard, agage having a compound adjustmentthat is, both vertically and laterally,with respect to the plane of the blade, whereby, as the edge of theknife becomes worn, the gage may be de pressed in coincidence therewith,so as to preserve the edge in its true normal working relation, while atthe same time the gage-may be adjusted laterally, so as to cause theknife to cut from the sole to be trimmed a shaving of any desirablethickness.

In the drawing, A and B denote, respectively, the handle and the bladeof an ordinary shoe-knife. O is a metallic frame or block, which isbifurcated to receive the blade B,the said block being clamped upon theblade by means of a screw, a, passing through the upper furcated portionof the block, as shown in Fig. 2. This block or frame is formed with achip-passage, b, as shown in the last-mentioned figure, and carries onits outer edge a lip or guard, 0, whose working face stands at an acuteangle with the edge of the knife. The outer portion of the guard, orthat which projects beyond the plane of the knife and running in thespace or channel between the upper and the sole, is formed convex on itsunder surface, so as to enable the guard, while bearing and pressing onthe upper surface of the sole, to rock or tilt, so as to allow the knifeto be readily turned to follow the contour or curvature of the sole, andout with a drawing stroke. D is a gage, which is affixed to the undersurface of the block 0, it being so applied thereto as to be capable ofbeing moved laterally toward and away from the edge of the knife, ascircumstances may require. d is a set-screw, which passes through anoblong slot, 0, formed transversely of the gage, and

screws into the block, as shown in Fig. 3, suchenabling the gage to bemoved laterally and set at any desired distance from the knife-edge, inorder to enable the latter to remove from the sole such thickness ofshaving as may be desirable.

In order to maintain the knife-edge, as it may become worn, in itsrequisite working position with respect to the guard, the latter isprovided with means of vertical or longitudinal adjustment, so that itmay be depressed in exact accordance with the wear of the knife. This iseffected by making the slot of the furcated block of a greater widththan that of the blade, such enabling the guard to be moved down, so asto preserve its true normal position with respect to the edge, theclamp-screw a serving to confine the gage in the desired position.

The blade of the knife is formed with its back rounding or taperingtoward its point, the outer end or point resting in a niche or recessformed in the inner surface of the lip or guard 0.

Furthermore, the rear portion of the block O is formed with a cavity, f,to receive the thumb of the operator, and enable him to grasp andproperly support and control the tool while in operation.

In using my improved implement the operator, having arranged the gage toenable the knife to cut a shaving of the desired thick- .ness, graspsthe handle and back of the blade,

and places his thumb in the thumb-cavity of the block 0, and next placesthe lip or guard c in the channel between the sole and the upper, andnext brings the edge of the knife upon the part-of the sole to bereduoedhe next bears the gage down upon the sole with suflicient forceto maintain the leather in contact with the cutting-edge of the knifewhile the latter is moved forward with the drawing stroke.

Haring described my invention, What I as set forth, the guard c, as madewith a conclaim isvex bearing-surface, as and for the purpose 1. Thegage I), having compound adjuststated. ments, as described, incombination with the blade 13, the furcated block C provided Withtheguard c, chip-throat b, and clamp-screw s, WVitnesses; substantially asand for the purpose set forth. F. P. HALE, 2. In a sole-trimming device,constructed FFO. HALE.

ARTHUR r. HAZARD.

